Since the project started almost 3 years ago, the color scheme had been Red fill, Black stroke, and a stroke width of 1px. Is it time to change?

One idea is White for the fill, Black for stroke (same), and a 5px line instead. This makes lines more easily manipulated, but it tends to make rectangles large (and the canvas is small). The normal Black/Red/1px is the same used by Flash (as far as I know), and numerous other editing tools (including svg-edit).